title: Rearrangement of the structure during nucleation of a cordierite glass doped with TiO(2).
abstract: Ordering of disordered materials occurs during the activated process of nucleation that requires the formation of critical clusters that have to surmount a thermodynamic barrier. The characterization of these clusters is experimentally challenging but mandatory to improve nucleation theory. In this paper, the nucleation of a magnesium alumino-silicate glass containing the nucleating oxide TiO(2) is investigated using neutron scattering with Ti isotopic substitution and (27)Al NMR. We identified the structural changes induced by the formation of crystals around Ti atoms and show important structural reorganization of the glassy matrix.
authors.affiliation: Institut de Minéralogie et de Physique des Milieux Condensés (IMPMC), CNRS UMR 7590, Université Pierre et Marie Curie, Université Paris Diderot, 140 rue de Lourmel, F-75015 Paris, France.
authors.forename: Marie
authors.initials: M
authors.lastname: Guignard
authors.forename: Laurent
authors.initials: L
authors.lastname: Cormier
authors.forename: Valérie
authors.initials: V
authors.lastname: Montouillout
authors.forename: Nicolas
authors.initials: N
authors.lastname: Menguy
authors.forename: Dominique
authors.initials: D
authors.lastname: Massiot
authors.forename: Alex C
authors.initials: AC
authors.lastname: Hannon
authors.forename: Brigitte
authors.initials: B
authors.lastname: Beuneu
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D003460:Crystallization; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D015233:Models, Statistical; D053758:Nanoparticles / Q000737:chemistry; D009502:Neutrons; D010825:Physics / Q000379:methods; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: C055335:cordierite; C009495:titanium dioxide; D014025:Titanium